Figure 3
The flow diagram is titled Sample Preparation Conditions. Three main branches extend from the title: Particle Diameter, Drop Height, and Number of Sieves. Under Particle Diameter, two options are listed: three-millimetre and six-millimetre. Under Drop Height, three options are listed: zero point three zero five-metre with one foot in brackets, zero point six one zero-metre with two feet in brackets, and zero point nine one five-metre with three feet in brackets. Under Number of Sieves, four options are listed: No sieve, one sieve, two sieves, and three sieves.Experimental design for sample preparation conditions